<template>
  <div>
    <div class="biggestBox">
      <ul>
        <!-- data-type=0 隐藏删除按钮 data-type=1 显示删除按钮 -->
        <li
          class="li_vessel"
          v-for="(item, index) in lists"
          data-type="0"
          :key="index"
        >
          <!-- "touchstart" 当手指触摸屏幕时候触发  "touchend"  当手指从屏幕上离开的时候触发  "capture" 用于事件捕获-->
          <div
            @touchstart.capture="touchStart"
            @touchend.capture="touchEnd"
            @click="oneself"
          >
            <div class="contant">
              <!-- //头像 -->
              <img class="image" :src="item.imgUrl" alt />
              <div class="rightBox">
                <!-- //name -->
                <div>
                  <div>{{ item.title }}</div>
                  <div>{{ item.faddish }}</div>
                </div>

                <div>{{ item.subheading }}</div>
                <!-- //上午7:00//-上午7:00 -->
                <!-- //你好呀 -->
                <div>{{ item.price }}</div>
              </div>
            </div>
          </div>
          <div class="removeBtn" @click="remove" :data-index="index">删除</div>
          <div class="dingzhi" @click="dingzhi" :data-index="index">顶置</div>
        </li>
      </ul>
    </div>
  </div>
</template>
 
<script>
export default {
  name: "index",
  data() {
    return {
      lists: [
        {
          title: "标题1",
          imgUrl: "https://z3.ax1x.com/2021/05/18/gfwKHg.jpg",
          subheading: "副标题1",
          faddish: "上午7:00",
          price: "考试的缴费风口浪尖离开家的框架",
        },
        {
          title: "标题2",
          imgUrl: "https://z3.ax1x.com/2021/05/18/gfwKHg.jpg",
          subheading: "副标题2",
          faddish: "上午8:00",
          price: "收快递费莱克斯顿减肥了水电费科技了",
        },
        {
          title: "标题3",
          imgUrl: "https://z3.ax1x.com/2021/05/18/gfwKHg.jpg",
          subheading: "副标题3",
          faddish: "上午9:00",
          price: "上岛咖啡乐山大佛酒精湿巾肯定能上，不烦你",
        },
        {
          title: "标题4",
          imgUrl: "https://z3.ax1x.com/2021/05/18/gfwKHg.jpg",
          subheading: "副标题4",
          faddish: "上午10:00",
          price: "哦is度饭卡里闪电少女，名称虚拟机很快就收到货弗兰克",
        },
        {
          title: "标题5",
          imgUrl: "https://z3.ax1x.com/2021/05/18/gfwKHg.jpg",
          subheading: "副标题5",
          faddish: "上午11:00",
          price: "水电费科技看卤蛋吉林师范环境科技的航空",
        },
      ],
      startX: 0, //滑动开始
      endX: 0, //滑动结束
    };
  },
  methods: {
    // 向左滑动出现删除按钮时，点击商品信息区域取消删除
    oneself() {
      if (this.checkSlide()) {
        this.restSlide();
      } else {
        // 点击商品信息弹出弹框
        alert("hello Word!");
      }
    },
    //滑动开始
    touchStart(e) {
      // 记录初始位置
      this.startX = e.touches[0].clientX;
    },
    //滑动结束
    touchEnd(e) {
      // 当前滑动的父级元素
      let parentElement = e.currentTarget.parentElement;
      // 记录结束位置
      this.endX = e.changedTouches[0].clientX;
      // 左滑大于30距离删除出现
      if (parentElement.dataset.type == 0 && this.startX - this.endX > 30) {
        this.restSlide();
        parentElement.dataset.type = 1;
      }
      // 右滑
      if (parentElement.dataset.type == 1 && this.startX - this.endX < -30) {
        this.restSlide();
        parentElement.dataset.type = 0;
      }
      this.startX = 0;
      this.endX = 0;
    },
    //判断当前是否有滑块处于滑动状态
    checkSlide() {
      let listItems = document.querySelectorAll(".li_vessel");
      for (let i = 0; i < listItems.length; i++) {
        if (listItems[i].dataset.type == 1) {
          return true;
        }
      }
      return false;
    },
    //复位滑动状态
    restSlide() {
      let listItems = document.querySelectorAll(".li_vessel");
      // 复位
      for (let i = 0; i < listItems.length; i++) {
        listItems[i].dataset.type = 0;
      }
    },
    //删除数据信息
    remove(e) {
      // 当前索引值
      let index = e.currentTarget.dataset.index;
      // 复位
      this.restSlide();
      // 删除数组lists中一个数据
      this.lists.splice(index, 1);
    },
  },
};
</script>
 
<style>
* {
  /* 消除默认内外边距 */
  margin: 0;
  padding: 0;
}
body {
  background: rgb(246, 245, 250);
}
.biggestBox {
  overflow: hidden; /*超出部分隐藏*/
}
ul {
  /* 消除 ul 默认样式 */
  list-style: none;
  padding: 0;
  margin: 0;
}

.li_vessel {
  /* 全部样式 0.2秒 缓动*/
  transition: all 0.2s;
}
/* =0隐藏 */
.li_vessel[data-type="0"] {
  transform: translate3d(0, 0, 0);
}
/* =1显示 */
.li_vessel[data-type="1"] {
  /* -64px 设置的越大可以左滑的距离越远，最好与下面删除按钮的宽度以及定位的距离设置一样的值*/
  transform: translate3d(-128px, 0, 0);
  display: flex;
  justify-content: space-between;
}
/* 删除按钮 */
.li_vessel .removeBtn {
  width: 64px;
  height: 103px;
  background: #ff4949;
  font-size: 16px;
  color: #fff;
  text-align: center;
  line-height: 22px;
  position: absolute;
  top: 0px;
  right: -64px;
  line-height: 103px;
  text-align: center;
  border-radius: 2px;
}
/* 顶置按钮 */
.li_vessel .dingzhi {
  width: 64px;
  height: 103px;
  background: #3ca7ff;
  font-size: 16px;
  color: #fff;
  text-align: center;
  line-height: 22px;
  position: absolute;
  top: 0px;
  right: -128px;
  line-height: 103px;
  text-align: center;
  border-radius: 2px;
}
/* 左边的图片样式 */
.contant {
  overflow: hidden; /*消除图片带来的浮动*/
  padding: 10px;
  background: #ffffff;
}

.contant .image {
  width: 80px;
  height: 80px;
  border-radius: 4px;
  float: left;
}
/* 右边的文字信息样式 */
.rightBox {
  overflow: hidden;
  padding-left: 8px;
}
.rightBox div:first-child {
  font-weight: bold;
  display: flex;
  justify-content: space-between;
}
.rightBox div:nth-child(2) {
  margin-top: 4px;
  font-size: 14px;
}
/* .rightBox div:nth-child(3) {
  width: 100px;
  background: rgba(28, 238, 245, 0.363);
  color: white;
  font-size: 12px;
  text-align: center;
  padding: 2px 4px 2px 4px;
  padding: 0px 5px;
  margin-left: auto;
} */
.rightBox div:last-child {
  color: rgba(175, 174, 174, 0.678);
  font-size: 14px;
  font-weight: bold;
}
</style>